Abstract: A method is set forth for treatment of hypoxic tumors by interstitial injection of oxygen bearing fluorocarbon emulsions directly into the hypoxic zone of the tumor followed by radiation treatment.

Abstract: The present invention is a membrane and a process for separating at least one component from at least one other component in a gas mixture. A gaseous mixture is passed over a membrane having a thin film of a molten salt hydrate which is selectively permeable to at least one component in the gaseous mixture.

Abstract: Novel compositions of matter are disclosed having the formula: ##STR1## wherein the carbon rings are fully fluorinated to remove all hydrogens and olefinic character. The compositions have utility as heat transfer agents, hydraulic fluids, vapor phase soldering fluids, gas (O.sub.2, N.sub.2, CO.sub.2, H.sub.2, etc.) transport agents, such as in biological and medical fields, as well as utility as burn-in test fluid.

Abstract: The present invention is an improved process for separating alcohols from ethers and/or hydrocarbon raffinate in an etherification process. The excess alcohol reactant, which forms azeotrope mixtures with the product ethers and C.sub.4 -C.sub.7 raffinate, is removed by passing the liquid azeotrope mixture over a pervaporation membrane which effectively breaks the azeotrope and permeates the alcohol with high flux and high selectivity. In a typical etherification process, one or more pervaporation membrane units can be located ahead of the ether/raffinate distillation step, in conjunction with the distillation step with a liquid side draw, after the distillation step, or a combination of any of the above. The present invention also provides an improved process for separating alcohols from ethers and/or hydrocarbon raffinate in an ether decomposition process for the production of high purity iso-alkene products.

Abstract: A copolymer emulsion for bonding nonwovens demonstrating increased blocking resistance comprising an aqueous medium having colloidally dispersed therein a copolymer consisting essentially of vinyl acetate, ethylene, a crosslinkable comonomer which is an N-acrylamidoglycolic acid or an acrylamidobutyraldehyde dialkyl acetal type compound, and a small amount of an acrylamide.

Abstract: A capillary for use in ball bonding tools designed to bond metal leads to the bonding pads on a microchip and pads or leads on a chip support is formed by chemically vapor depositing a substantially smooth silicon carbide coating having high electrical resistivity onto a substrate which is then removed by etching or combustion.

Abstract: A vinyl alcohol copolymer comprising the following general structure ##STR1## where R is hydrogen or methyl;R.sup.1 is a C.sub.6 -C.sub.18 hydrocarbyl group not containing an olefinic functionality;x is 70 to 99.5% mole %;y is 0 to 29.5 mole %; andz is 0.5 to 8 mole %.

Abstract: Ground polymer elastomer or other polymeric plastic, particularly from recovered scrap, is surface modified by treatment with a gaseous mixture containing a minor amount of fluorine and a larger amount of at least one reactive gas in an inert gaseous carrier. By the treatment the ground material is made more compatible for admixture with polyfunctional polymer-forming liquids, thereby obtaining novel composites of controlled physical properties. The other reactive gas is preferably oxygen or one of the gases from the group consisting of: chlorine and SO.sub.2 with or without added oxygen.

Abstract: Blanketing of molten aluminum-lithium alloys is performed under a nontoxic and noncorrosive dichlorodifluoromethane containing gas atmosphere, which produces a thin self-passivating fluxing film on the melt surface. The blanketing atmosphere protects the melt from oxidation, burning, and lithium evaporation, improves alloy cleanliness and can be used in any furnace, transfer or casting operation. The blanketing atmosphere can be applied in the entire range of commercial or master aluminum-lithium alloys including pure lithium melts. The dichlorodifluoromethane concentration in the blanketing atmosphere can range from 0.05 to 100 vol % with the remainder being an inert gas such as argon.

Abstract: High purity methane and carbon dioxide are recovered from landfill gas in an integrated multi-column adsorption system having a temperature swing adsorption section (TSA) for pretreatment of the crude landfill gas to remove trace impurities therefrom, the thus cleaned gas being fed to a pressure swing adsorption section (PSA) for bulk separation of CO.sub.2 from methane. Regeneration of the impurity-laden adsorbent bed of the TSA section is carried out using part of the CO.sub.2 product gas recovered from the PSA section which gas is heated to thermal regeneration temperature.

Abstract: In the preparation of a high resiliency polyurethane foam by reacting a polyisocyanate with a polyurea dispersion-containing polyol based masterbatch composition also containing a tertiary amine catalyst for the polyurethane reaction, the improvement for eliminating cure draft of such stored polyol compositions which comprises employing a catalyst composition consisting essentially of5 to 15 wt % triethylenediamine,20 to 35 wt % 4-(2-dimethylaminoethyl) morpholine,20 to 35 wt % N,N,N',N'-tetramethyl-1,2-diamino-2-methylpropane,10 to 25 wt % bis(dimethylaminoethyl)ether, and5 to 40 wt % of an N-hydroxyalkyl quaternary ammonium acid salt.

Abstract: An aqueous copolymer emulsion comprising a copolymer consisting essentially of vinyl chloride, ethylene and up to 10 wt % hydroxyalkyl (meth)acrylate colloidally dispersed in an aqueous medium. The copolymer demonstrates improved solvent resistance and metal adhesion, especially to low energy films.

Abstract: The present invention is a process for the production of methanol from a syngas feed containing carbon monoxide, carbon dioxide and hydrogen. Basically, the process is the combination of two liquid phase methanol reactors into a staging process, such that each reactor is operated to favor a particular reaction mechanism. In the first reactor, the operation is controlled to favor the hydrogenation of carbon monoxide, and in the second reactor, the operation is controlled so as to favor the hydrogenation of carbon dioxide. This staging process results in substantial increases in methanol yield.

Abstract: The present invention relates to a process for the reduction of the color of polyamines by reacting at elevated temperature, i.e. 50.degree. to 175.degree. C., and pressure, i.e. 50 to 1500 psig, such colored polyamines, e.g. triethylenetetramine or tetraethylenepentamine, in the presence of a hydrogenation catalyst, e.g. Raney nickel or palladium on carbon, and a hydrogen atmosphere for a period of time sufficient to effectuate the desired reduction in color. In the process of the present invention, the polyamines can either be distilled into a narrow product composition and then hydrogenated or a crude polyamine product can be hydrogenated and then distilled to produce the desired product composition.

Abstract: The present invention is a process for the liquefaction of hydrogen which utilizes a dense fluid expander and neon as a precoolant refrigerant. In the process, a two phase mixture containing about 85-90% liquid of greater than 95% para-hydrogen is produced in a dense fluid expander. Most of the refrigeration for liquefaction is supplied by a neon refrigeration system, consisting of a centrifugal compressor, heat exchangers and one or more stages of neon expansion. As an option, further refrigeration may be supplied utilizing liquid nitrogen as another precoolant.

Abstract: The present invention is a method for improving the barrier properties of thermoplastic substrates. A surface of the thermoplastic substrate is contacted with a reactive gas stream having an F.sub.2 concentration greater than or equivalent to 0.0001 atm. partial pressure of F.sub.2 per atm. total pressure and sufficient oxygen such that the F.sub.2 /O.sub.2 ratio is less than or equal to about 100, with the remainder being additional reactive and/or non-reactive components. A barrier coating material is applied to the treated surface of the substrate and subsequently undergoes a curing step to form the final product.

Abstract: The present invention is a process for separating ammonia from mixtures of other gases or from aqueous streams. The ammonia-containing mixture is contacted with a membrane containing, as the active component, a salt having the structural formula: NR.sub.4.sup.+ X.sup.-, wherein each R is independently H or a straight chain or branched alkyl group and X.sup.- is an organic or inorganic anion. The membrane is useful for the selective permeation of ammonia from mixtures of gases containing ammonia, nitrogen and hydrogen.

Abstract: High purity methane is recovered from a fuel gas stream containing the same in admixture with mainly nitrogen and carbon dioxide, by first removing the carbon dioxide by selective adsorption in a PSA system and separating the remaining nitrogen from the methane by cryogenic distillation, the rejected nitrogen being employed for purging the CO.sub.2 -laden adsorbent beds of the PSA system. Cyclic regeneration of the sorbent-laden bed may entail nitrogen purge with or without including a carbon dioxide rinse, or the nitrogen purge of the sorbent-laden bed may be used in combination with pressure let-down by gas withdrawal into one or more companion beds.

Abstract: The present invention is a process for separating one or more components of a gas mixture. The process comprises passing the gas mixture over a membrane, which is selectively permeable to the component being separated, due to one or more reversible reactions between the component desired to be separated and a layer of active molten material immobilized in a suitable support material and/or encapsulated in a non-porous gas permeable polymer material.

Abstract: This invention relates to a process for producing ring alkylated aromatic amines. In accordance with this process an aromatic amine is reacted with an olefin, diolefin or an alcohol using a non-zeolitic molecular sieve as a catalyst. Under the conditions of the process the catalyst is extremely active, and with aromatic amines that are capable of alkylation at the ortho and para positions, high selectivity to the ortho alkylated isomer can be achieved.